<%@page import="java.util.HashMap"%>
<%@page import="java.util.Map"%>
<%@page import="java.util.ArrayList"%>
<%@page import="com.situ.web.entity.Student"%>
<%@page import="java.util.List"%>
<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<%@taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>    
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
	
	
	<!-- 1、数据放到域对象中 -->
	<%
		pageContext.setAttribute("age", 23);
		pageContext.setAttribute("gender", "女");
	%>
	<c:set var="age" value="20"></c:set>
	${age }<br>
	${gender }<br>
	<hr>
	<!-- 2、单条件判断 -->
	<c:if test="${age==20 }">
		今年二十岁了
	</c:if><br>
	<c:if test="${gender=='男' }">
		男
	</c:if>
	<c:if test="${gender=='女' }">
		女
	</c:if>
	<hr>
	<!-- 3、多条件判断 -->
	<c:set var="score" value="90"></c:set>
	<c:choose>
		<c:when test="${score>=90&&score<=100 }">
			优秀
		</c:when>
		<c:when test="${score>=80&&score<90 }">
			良好
		</c:when>
		<c:when test="${score>=70&&score<80 }">
			一般
		</c:when>
		<c:when test="${score>=60&&score<70 }">
			及格
		</c:when>
		<c:otherwise>
			不及格
		</c:otherwise>
	</c:choose>
	<hr>
	
	<!-- 4、集合遍历
		4.1 List<String>
		4.2 List<Student>
		4.3 Map<String,String>   Map<String,Student>
	 -->
	<c:forEach begin="0" end="5" var="i">
		${i }
	</c:forEach>
	<hr>
	
	<%
		List<Student> list =new ArrayList<Student>();
		Student student1 = new Student(1,"赵六1",23,"男");
		Student student2 = new Student(1,"赵六2",23,"男");
		Student student3 = new Student(1,"赵六3",23,"男");
		list.add(student1);
		list.add(student2);
		list.add(student3);
		application.setAttribute("list", list);
	%>
	<c:forEach items="${list }" var="student">
		${student.name }----${student.age }
		${student }
		<hr>
	</c:forEach>
	
	
	<!-- 
		Map<String,String>   Map<String,Student>
	 -->
	<%
		Map<String,String> map = new HashMap<String,String>();
		map.put("cn", "中国");
		map.put("us", "英国");
		request.setAttribute("map", map);
	%>
	<hr>
	<c:forEach items="${map }" var="entry">
		${entry.key }---------${entry.value }<hr>
	</c:forEach>
	<hr>
	<%
		Map<String, Student> map2 = new HashMap<String, Student>();
		Student stu1 = new Student(1, "赵六11", 23, "男");
		Student stu2 = new Student(1, "赵六22", 23, "男");
		Student stu3 = new Student(1, "赵六33", 23, "男");
		map2.put("stu1", stu1);
		map2.put("stu2", stu2);
		map2.put("stu3", stu3);
		application.setAttribute("map2", map2);
	%>
	<c:forEach items="${map2}" var="entry">
		${entry.key}--${entry.value}--${entry.value.name} <br/>
	</c:forEach>
</body>
</html>